a)32:16+{76-2*[(20+20):5]-2*6}
32:16+{76-2*[40:5]-2*6}
32:16+{76-2*8-2*6}
32:16+{76-16-12}
32:16+48
2+48=50
b)63:21=3
c)3+10*{3+10*[3+10*(3+30)-3]-3}-3
3+10*{3+10*[3+10*33-3]-3}-3
3+10*{3+10*[3+330-3]-3}-3
3+10*{3+10*330-3}-3
3+10*{3+3300-3}-3
3+10*3300-3
3+33000-3=33000
sa ai bafta!!!